Deep Sky Object in Summer
M80 (Globular Cluster in Scorpius)
|Date & Time: ||Apr 24 2004, from 25:07 to 25:14 JST(+0900)
|Composed 2 shots with 5 minutes exposed|
|Optical: ||Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
|Auto-guided with Meade LX200 Equatorial & Pictor 201XT
|Digital Camera: ||Fujifilm FinePix S2 Pro
|Location: ||Ooizumi vil., Yamanashi pref.
|Camera Settings: ||Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3024×2016)|
|CCD Sensitivity...ISO1600, White Balance...Auto|
M80 is a small, but fairly bright globular cluster at 4.5 degrees NW of Antares around the head of Scorpius.
The cluster has a bright central nucleus, its snug figure can be appreciated only through portable binoculars.
The concentration rate of the cluster is very high, it might be difficult to resolve the central structure of this globular.
While you can enjoy another globular cluster of M4 just west of Antares, M4 has very sparse concentration;
it's interesting to compare the difference of these two globular clusters.
|M80(NGC6093) / Globular Cluster, type II|
|R.A.||16h 17m 0.0s (2000.0)|
|Dec.||-22° 59' 00" (2000.0)|
|Real Size||55 light yrs.|
|Distance||36 thousand light yrs.|